Connected Devices: added remote control

src/app/mod.rs

@@ -69,6 +69,64 @@ fn err_string(err: anyhow::Error) -> String {
     format!("{err:#}")
 }
 
+fn spawn_content_id_backfill(runtime: &Runtime) {
+    let library = Arc::clone(&runtime.library);
+    let federation = Arc::clone(&runtime.federation);
+    let devices = Arc::clone(&runtime.devices);
+    let tx = runtime.event_tx.clone();
+    tokio::spawn(async move {
+        let stats =
+            match tokio::task::spawn_blocking(move || library.backfill_missing_content_ids()).await
+            {
+                Ok(Ok(stats)) => stats,
+                Ok(Err(err)) => {
+                    tracing::warn!("content id backfill failed: {err:#}");
+                    let _ = tx.send(AppEvent::StatusMessage(format!(
+                        "content id backfill failed: {err:#}"
+                    )));
+                    return;
+                }
+                Err(err) => {
+                    tracing::warn!("content id backfill task failed: {err}");
+                    let _ = tx.send(AppEvent::StatusMessage(format!(
+                        "content id backfill task failed: {err}"
+                    )));
+                    return;
+                }
+            };
+
+        if stats.updated() == 0 {
+            if stats.failed > 0 {
+                tracing::warn!(
+                    checked = stats.checked,
+                    failed = stats.failed,
+                    "content id backfill finished with unreadable tracks"
+                );
+            }
+            return;
+        }
+
+        tracing::info!(
+            checked = stats.checked,
+            normalized = stats.normalized,
+            hashed = stats.hashed,
+            failed = stats.failed,
+            "content id backfill completed"
+        );
+        let _ = tx.send(AppEvent::LibraryChanged {
+            message: Some(format!("content ids: indexed {} track(s)", stats.updated())),
+        });
+
+        if federation.status().await.running {
+            if let Err(err) = federation.sync_now().await {
+                tracing::warn!("federation sync after content id backfill failed: {err:#}");
+            }
+            let _ = tx.send(AppEvent::FederationStatus(federation.status().await));
+            let _ = tx.send(AppEvent::DeviceSyncStatus(devices.status()));
+        }
+    });
+}
+
 pub async fn run(
     mut terminal: DefaultTerminal,
     mut keymap: Keymap,
@@ -128,6 +186,7 @@ pub async fn run(
         media_tx,
         last_media_push: None,
     };
+    spawn_content_id_backfill(&runtime);
 
     {
         let fed = Arc::clone(&runtime.federation);
@@ -1242,6 +1301,17 @@ fn start_current_audio(
         spawn_fed_resolve(runtime, &track);
         return;
     }
+    if track_file_missing(&track) {
+        runtime.player_start_pending = false;
+        runtime.player.stop();
+        state.player.playing = false;
+        state.player.paused = false;
+        state.status_message = Some(format!(
+            "playback failed: \"{}\" is not available on this device",
+            track.title
+        ));
+        return;
+    }
     let controller = runtime.player.clone();
     let volume = player::amplitude(state.player.volume);
     let tx = runtime.event_tx.clone();
@@ -1271,7 +1341,7 @@ fn start_current_audio(
 }
 
 fn track_file_missing(track: &crate::library::models::TrackItem) -> bool {
-    !track.file_path.is_empty() && !Path::new(&track.file_path).is_file()
+    track.file_path.is_empty() || !Path::new(&track.file_path).is_file()
 }
 
 fn local_track_for_playback(

src/devices.rs

@@ -106,6 +106,8 @@ pub struct PlaybackTrack {
     pub release_id: i64,
     pub release_title: String,
     pub release_year: Option<i32>,
+    /// Legacy compatibility only. Paths are device-local, so playback sync
+    /// must resolve tracks from content/federation identifiers instead.
     #[serde(default)]
     pub file_path: String,
     pub content_id: Option<String>,
@@ -141,8 +143,11 @@ impl PlaybackTrack {
             release_id: track.release_id,
             release_title: track.release_title.clone(),
             release_year: track.release_year,
-            file_path: track.file_path.clone(),
-            content_id: track.content_id.clone(),
+            file_path: String::new(),
+            content_id: track
+                .content_id
+                .clone()
+                .or_else(|| track.fed.as_ref().and_then(|fed| fed.content_id.clone())),
             audio_format: track.audio_format.clone(),
             audio_bitrate: track.audio_bitrate,
             audio_sample_rate: track.audio_sample_rate,
@@ -174,7 +179,7 @@ impl PlaybackTrack {
             release_id: self.release_id,
             release_title: self.release_title.clone(),
             release_year: self.release_year,
-            file_path: self.file_path.clone(),
+            file_path: String::new(),
             content_id: self.content_id.clone(),
             cover_path: None,
             audio_format: self.audio_format.clone(),
@@ -3414,6 +3419,44 @@ mod tests {
         );
     }
 
+    #[test]
+    fn playback_tracks_do_not_sync_device_local_paths() {
+        let source = TrackItem {
+            id: 7,
+            title: "Local Song".to_string(),
+            track_number: Some(1),
+            disc_number: Some(1),
+            duration_seconds: 180.0,
+            artists: vec![ArtistRef {
+                id: 1,
+                name: "Local Artist".to_string(),
+            }],
+            featured_artists: Vec::new(),
+            release_id: 2,
+            release_title: "Local Release".to_string(),
+            release_year: Some(2026),
+            file_path: r"C:\Users\me\Music\song.mp3".to_string(),
+            content_id: Some(format!("b3:{}", "a".repeat(64))),
+            cover_path: None,
+            audio_format: Some("mp3".to_string()),
+            audio_bitrate: Some(320),
+            audio_sample_rate: Some(44_100),
+            audio_bit_depth: None,
+            file_size_bytes: Some(123_456),
+            play_count: 3,
+            fed: None,
+        };
+
+        let wire = PlaybackTrack::from_track(&source);
+        assert!(wire.file_path.is_empty());
+
+        let mut legacy_wire = wire.clone();
+        legacy_wire.file_path = "/Users/me/Music/song.mp3".to_string();
+        let restored = legacy_wire.to_track_item();
+        assert!(restored.file_path.is_empty());
+        assert_eq!(restored.content_id, source.content_id);
+    }
+
     #[test]
     fn compacted_device_revoke_removes_device_row() {
         let sync = test_sync();

src/library/mod.rs

@@ -154,6 +154,20 @@ pub struct FederationExport {
     pub tracks: Vec<ExportTrack>,
 }
 
+#[derive(Debug, Clone, Default, PartialEq, Eq)]
+pub struct ContentIdBackfillStats {
+    pub checked: usize,
+    pub normalized: usize,
+    pub hashed: usize,
+    pub failed: usize,
+}
+
+impl ContentIdBackfillStats {
+    pub fn updated(&self) -> usize {
+        self.normalized + self.hashed
+    }
+}
+
 #[derive(Debug)]
 pub struct ExportRelease {
     pub id: i64,
@@ -217,6 +231,78 @@ impl Library {
         &self.covers_dir
     }
 
+    /// Make `content_id` a local-library invariant.
+    ///
+    /// Old databases can have NULL/invalid ids because the column was added
+    /// after import already existed. This scans rows cheaply, hashes only the
+    /// tracks that actually need an id, and never holds the SQLite lock while
+    /// reading audio files from disk.
+    pub fn backfill_missing_content_ids(&self) -> Result<ContentIdBackfillStats> {
+        let rows = {
+            let conn = self.lock();
+            let mut statement =
+                conn.prepare("SELECT id, content_id, file_path FROM tracks ORDER BY id")?;
+            statement
+                .query_map([], |row| {
+                    Ok((
+                        row.get::<_, i64>(0)?,
+                        row.get::<_, Option<String>>(1)?,
+                        row.get::<_, String>(2)?,
+                    ))
+                })?
+                .collect::<rusqlite::Result<Vec<_>>>()?
+        };
+
+        let mut stats = ContentIdBackfillStats {
+            checked: rows.len(),
+            ..ContentIdBackfillStats::default()
+        };
+        let mut updates = Vec::new();
+        for (track_id, raw_content_id, file_path) in rows {
+            if let Some(normalized) = raw_content_id
+                .as_deref()
+                .and_then(music_dht::normalize_content_id)
+            {
+                if raw_content_id.as_deref() != Some(normalized.as_str()) {
+                    updates.push((track_id, normalized));
+                    stats.normalized += 1;
+                }
+            } else if let Some(content_id) = audio_content_id(&file_path) {
+                updates.push((track_id, content_id));
+                stats.hashed += 1;
+            } else {
+                stats.failed += 1;
+                tracing::warn!(
+                    track_id,
+                    path = %file_path,
+                    "content id backfill skipped an unreadable track"
+                );
+            }
+
+            if updates.len() >= 64 {
+                self.write_content_id_updates(&mut updates)?;
+            }
+        }
+        self.write_content_id_updates(&mut updates)?;
+        Ok(stats)
+    }
+
+    fn write_content_id_updates(&self, updates: &mut Vec<(i64, String)>) -> Result<()> {
+        if updates.is_empty() {
+            return Ok(());
+        }
+        let mut conn = self.lock();
+        let tx = conn.transaction()?;
+        for (track_id, content_id) in updates.drain(..) {
+            tx.execute(
+                "UPDATE tracks SET content_id = ?2 WHERE id = ?1",
+                params![track_id, content_id],
+            )?;
+        }
+        tx.commit()?;
+        Ok(())
+    }
+
     fn lock(&self) -> std::sync::MutexGuard<'_, Connection> {
         self.conn.lock().unwrap_or_else(|poisoned| {
             // A panic mid-query leaves the connection usable; keep going.
@@ -2230,6 +2316,60 @@ mod tests {
         assert_eq!(page.items[0].track_count, 1);
     }
 
+    #[test]
+    fn content_id_backfill_hashes_missing_track_ids() {
+        let lib = test_library();
+        let path = std::env::temp_dir().join(format!(
+            "furumi-content-id-test-{}-{}.bin",
+            std::process::id(),
+            std::time::SystemTime::now()
+                .duration_since(std::time::UNIX_EPOCH)
+                .unwrap()
+                .as_nanos()
+        ));
+        std::fs::write(&path, b"portable content id").unwrap();
+        let file_path = path.to_string_lossy().into_owned();
+        let import = import::TrackImport {
+            release_type: None,
+            file_path: file_path.clone(),
+            title: "Portable".to_string(),
+            artists: vec!["Artist".to_string()],
+            featured_artists: Vec::new(),
+            album_artists: vec!["Artist".to_string()],
+            release_title: "Album".to_string(),
+            year: Some(2026),
+            track_number: None,
+            disc_number: None,
+            duration_seconds: 60.0,
+            audio_format: Some("bin".into()),
+            audio_bitrate: None,
+            audio_sample_rate: None,
+            audio_bit_depth: None,
+            file_size_bytes: Some(19),
+            cover: None,
+        };
+        let track_id = import::upsert_track(&lib, &import).unwrap().0;
+        let expected = audio_content_id(&file_path).unwrap();
+        {
+            let conn = lib.lock();
+            conn.execute(
+                "UPDATE tracks SET content_id = NULL WHERE id = ?1",
+                [track_id],
+            )
+            .unwrap();
+        }
+
+        let stats = lib.backfill_missing_content_ids().unwrap();
+        assert_eq!(stats.hashed, 1);
+        assert_eq!(stats.updated(), 1);
+        assert_eq!(
+            lib.track_content_id_by_id(track_id).unwrap().as_deref(),
+            Some(expected.as_str())
+        );
+
+        let _ = std::fs::remove_file(path);
+    }
+
     #[test]
     fn search_finds_all_kinds() {
         let lib = test_library();